595 lines
16 KiB
Diff
595 lines
16 KiB
Diff
From 3349eaf79dd91c2e6f9b7aed0c155668e4f5a856 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= <noralf@tronnes.org>
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Date: Fri, 26 Jun 2015 14:37:19 +0200
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Subject: [PATCH 117/121] BCM270x: Switch to firmware driver
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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defconfig: enable BCM2835_MBOX, RASPBERRYPI_FIRMWARE and BCM_VCIO.
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Add firmware node and change mailbox node in Device Tree.
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Add/update platform file for firmware and mailbox.
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Strip bcm2708-vcio of everything except the legacy API and hook it
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up with the firmware driver.
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Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
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---
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arch/arm/boot/dts/bcm2708_common.dtsi | 8 +-
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arch/arm/configs/bcm2709_defconfig | 3 +
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arch/arm/configs/bcmrpi_defconfig | 3 +
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arch/arm/mach-bcm2708/bcm2708.c | 13 +-
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arch/arm/mach-bcm2709/bcm2709.c | 13 +-
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drivers/mailbox/Kconfig | 2 +-
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drivers/mailbox/bcm2708-vcio.c | 353 ++--------------------------------
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7 files changed, 51 insertions(+), 344 deletions(-)
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--- a/arch/arm/boot/dts/bcm2708_common.dtsi
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+++ b/arch/arm/boot/dts/bcm2708_common.dtsi
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@@ -74,9 +74,10 @@
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};
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mailbox: mailbox@7e00b800 {
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- compatible = "brcm,bcm2708-vcio";
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+ compatible = "brcm,bcm2835-mbox";
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reg = <0x7e00b880 0x40>;
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interrupts = <0 1>;
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+ #mbox-cells = <0>;
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};
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watchdog: watchdog@7e100000 {
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@@ -205,6 +206,11 @@
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<1 9>;
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};
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+ firmware: firmware {
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+ compatible = "raspberrypi,bcm2835-firmware";
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+ mboxes = <&mailbox>;
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+ };
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+
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leds: leds {
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compatible = "gpio-leds";
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};
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--- a/arch/arm/configs/bcm2709_defconfig
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+++ b/arch/arm/configs/bcm2709_defconfig
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@@ -574,6 +574,7 @@ CONFIG_HW_RANDOM_BCM2708=m
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CONFIG_RAW_DRIVER=y
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CONFIG_BRCM_CHAR_DRIVERS=y
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CONFIG_BCM_VC_CMA=y
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+CONFIG_BCM_VCIO=y
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CONFIG_BCM_VC_SM=y
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CONFIG_I2C=y
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CONFIG_I2C_CHARDEV=m
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@@ -1074,6 +1075,7 @@ CONFIG_FB_FLEX=m
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CONFIG_FB_TFT_FBTFT_DEVICE=m
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CONFIG_MAILBOX=y
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CONFIG_BCM2708_MBOX=y
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+CONFIG_BCM2835_MBOX=y
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# CONFIG_IOMMU_SUPPORT is not set
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CONFIG_EXTCON=m
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CONFIG_EXTCON_ARIZONA=m
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@@ -1082,6 +1084,7 @@ CONFIG_IIO_BUFFER=y
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CONFIG_IIO_BUFFER_CB=y
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CONFIG_IIO_KFIFO_BUF=m
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CONFIG_DHT11=m
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+CONFIG_RASPBERRYPI_FIRMWARE=y
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CONFIG_EXT4_FS=y
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CONFIG_EXT4_FS_POSIX_ACL=y
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CONFIG_EXT4_FS_SECURITY=y
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--- a/arch/arm/configs/bcmrpi_defconfig
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+++ b/arch/arm/configs/bcmrpi_defconfig
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@@ -567,6 +567,7 @@ CONFIG_HW_RANDOM_BCM2708=m
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CONFIG_RAW_DRIVER=y
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CONFIG_BRCM_CHAR_DRIVERS=y
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CONFIG_BCM_VC_CMA=y
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+CONFIG_BCM_VCIO=y
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CONFIG_BCM_VC_SM=y
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CONFIG_I2C=y
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CONFIG_I2C_CHARDEV=m
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@@ -1067,6 +1068,7 @@ CONFIG_FB_FLEX=m
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CONFIG_FB_TFT_FBTFT_DEVICE=m
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CONFIG_MAILBOX=y
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CONFIG_BCM2708_MBOX=y
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+CONFIG_BCM2835_MBOX=y
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# CONFIG_IOMMU_SUPPORT is not set
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CONFIG_EXTCON=m
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CONFIG_EXTCON_ARIZONA=m
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@@ -1075,6 +1077,7 @@ CONFIG_IIO_BUFFER=y
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CONFIG_IIO_BUFFER_CB=y
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CONFIG_IIO_KFIFO_BUF=m
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CONFIG_DHT11=m
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+CONFIG_RASPBERRYPI_FIRMWARE=y
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CONFIG_EXT4_FS=y
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CONFIG_EXT4_FS_POSIX_ACL=y
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CONFIG_EXT4_FS_SECURITY=y
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--- a/arch/arm/mach-bcm2708/bcm2708.c
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+++ b/arch/arm/mach-bcm2708/bcm2708.c
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@@ -405,7 +405,7 @@ static struct resource bcm2708_vcio_reso
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static u64 vcio_dmamask = DMA_BIT_MASK(DMA_MASK_BITS_COMMON);
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static struct platform_device bcm2708_vcio_device = {
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- .name = "bcm2708_vcio",
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+ .name = "bcm2835-mbox",
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.id = -1, /* only one VideoCore I/O area */
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.resource = bcm2708_vcio_resources,
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.num_resources = ARRAY_SIZE(bcm2708_vcio_resources),
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@@ -415,6 +415,16 @@ static struct platform_device bcm2708_vc
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},
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};
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+static u64 rpifw_dmamask = DMA_BIT_MASK(DMA_MASK_BITS_COMMON);
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+
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+static struct platform_device bcm2708_rpifw_device = {
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+ .name = "raspberrypi-firmware",
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+ .dev = {
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+ .dma_mask = &rpifw_dmamask,
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+ .coherent_dma_mask = DMA_BIT_MASK(DMA_MASK_BITS_COMMON),
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+ },
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+};
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+
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static struct resource bcm2708_vchiq_resources[] = {
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{
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.start = ARMCTRL_0_BELL_BASE,
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@@ -871,6 +881,7 @@ void __init bcm2708_init(void)
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bcm_register_device_dt(&bcm2708_dmaengine_device);
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bcm_register_device_dt(&bcm2708_vcio_device);
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+ bcm_register_device_dt(&bcm2708_rpifw_device);
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bcm_register_device_dt(&bcm2708_vchiq_device);
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#ifdef CONFIG_BCM2708_GPIO
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bcm_register_device_dt(&bcm2708_gpio_device);
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--- a/arch/arm/mach-bcm2709/bcm2709.c
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+++ b/arch/arm/mach-bcm2709/bcm2709.c
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@@ -426,7 +426,7 @@ static struct resource bcm2708_vcio_reso
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static u64 vcio_dmamask = DMA_BIT_MASK(DMA_MASK_BITS_COMMON);
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static struct platform_device bcm2708_vcio_device = {
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- .name = "bcm2708_vcio",
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+ .name = "bcm2835-mbox",
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.id = -1, /* only one VideoCore I/O area */
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.resource = bcm2708_vcio_resources,
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.num_resources = ARRAY_SIZE(bcm2708_vcio_resources),
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@@ -436,6 +436,16 @@ static struct platform_device bcm2708_vc
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},
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};
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+static u64 rpifw_dmamask = DMA_BIT_MASK(DMA_MASK_BITS_COMMON);
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+
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+static struct platform_device bcm2708_rpifw_device = {
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+ .name = "raspberrypi-firmware",
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+ .dev = {
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+ .dma_mask = &rpifw_dmamask,
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+ .coherent_dma_mask = DMA_BIT_MASK(DMA_MASK_BITS_COMMON),
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+ },
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+};
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+
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static struct resource bcm2708_vchiq_resources[] = {
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{
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.start = ARMCTRL_0_BELL_BASE,
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@@ -892,6 +902,7 @@ void __init bcm2709_init(void)
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bcm_register_device_dt(&bcm2708_dmaengine_device);
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bcm_register_device_dt(&bcm2708_vcio_device);
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+ bcm_register_device_dt(&bcm2708_rpifw_device);
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bcm_register_device_dt(&bcm2708_vchiq_device);
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#ifdef CONFIG_BCM2708_GPIO
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bcm_register_device_dt(&bcm2708_gpio_device);
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--- a/drivers/mailbox/Kconfig
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+++ b/drivers/mailbox/Kconfig
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@@ -9,7 +9,7 @@ if MAILBOX
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config BCM2708_MBOX
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bool "Broadcom BCM2708 Mailbox (vcio)"
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- depends on MACH_BCM2708 || MACH_BCM2709 || ARCH_BCM2835
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+ depends on BCM2835_MBOX
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help
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Broadcom BCM2708 Mailbox (vcio)
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--- a/drivers/mailbox/bcm2708-vcio.c
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+++ b/drivers/mailbox/bcm2708-vcio.c
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@@ -1,6 +1,4 @@
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/*
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- * linux/arch/arm/mach-bcm2708/vcio.c
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- *
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* Copyright (C) 2010 Broadcom
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*
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* This program is free software; you can redistribute it and/or modify
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@@ -12,195 +10,38 @@
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* VideoCore processor
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*/
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-#include <linux/device.h>
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#include <linux/dma-mapping.h>
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-#include <linux/module.h>
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-#include <linux/errno.h>
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-#include <linux/fs.h>
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#include <linux/init.h>
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-#include <linux/interrupt.h>
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-#include <linux/io.h>
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-#include <linux/ioctl.h>
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+#include <linux/module.h>
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#include <linux/platform_data/mailbox-bcm2708.h>
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-#include <linux/platform_device.h>
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#include <linux/uaccess.h>
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+#include <soc/bcm2835/raspberrypi-firmware.h>
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#define DRIVER_NAME "bcm2708_vcio"
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-#define DEVICE_FILE_NAME "vcio"
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-
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-/* offsets from a mail box base address */
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-#define MAIL0_RD 0x00 /* read - and next 4 words */
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-#define MAIL0_POL 0x10 /* read without popping the fifo */
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-#define MAIL0_SND 0x14 /* sender ID (bottom two bits) */
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-#define MAIL0_STA 0x18 /* status */
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-#define MAIL0_CNF 0x1C /* configuration */
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-#define MAIL1_WRT 0x20 /* write - and next 4 words */
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-#define MAIL1_STA 0x38 /* status */
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-
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-/* On MACH_BCM270x these come through <linux/interrupt.h> (arm_control.h ) */
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-#ifndef ARM_MS_EMPTY
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-#define ARM_MS_EMPTY BIT(30)
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-#define ARM_MS_FULL BIT(31)
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-
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-#define ARM_MC_IHAVEDATAIRQEN BIT(0)
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-#endif
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-
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-#define MBOX_MSG(chan, data28) (((data28) & ~0xf) | ((chan) & 0xf))
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-#define MBOX_MSG_LSB(chan, data28) (((data28) << 4) | ((chan) & 0xf))
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-#define MBOX_CHAN(msg) ((msg) & 0xf)
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-#define MBOX_DATA28(msg) ((msg) & ~0xf)
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-#define MBOX_DATA28_LSB(msg) (((uint32_t)msg) >> 4)
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-
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-#define MBOX_MAGIC 0xd0d0c0de
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-
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-#define MAJOR_NUM 100
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-#define IOCTL_MBOX_PROPERTY _IOWR(MAJOR_NUM, 0, char *)
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-
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-static struct class *vcio_class;
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-
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-struct vc_mailbox {
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- void __iomem *regs;
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- uint32_t msg[MBOX_CHAN_COUNT];
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- struct semaphore sema[MBOX_CHAN_COUNT];
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- uint32_t magic;
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-};
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-
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-static void mbox_init(struct vc_mailbox *mbox_out)
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-{
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- int i;
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-
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- for (i = 0; i < MBOX_CHAN_COUNT; i++) {
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- mbox_out->msg[i] = 0;
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- sema_init(&mbox_out->sema[i], 0);
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- }
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-
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- /* Enable the interrupt on data reception */
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- writel(ARM_MC_IHAVEDATAIRQEN, mbox_out->regs + MAIL0_CNF);
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-
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- mbox_out->magic = MBOX_MAGIC;
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-}
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-
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-static int mbox_write(struct vc_mailbox *mbox, unsigned chan, uint32_t data28)
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-{
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- if (mbox->magic != MBOX_MAGIC)
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- return -EINVAL;
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-
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- /* wait for the mailbox FIFO to have some space in it */
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- while (0 != (readl(mbox->regs + MAIL1_STA) & ARM_MS_FULL))
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- cpu_relax();
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-
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- writel(MBOX_MSG(chan, data28), mbox->regs + MAIL1_WRT);
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-
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- return 0;
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-}
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-
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-static int mbox_read(struct vc_mailbox *mbox, unsigned chan, uint32_t *data28)
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-{
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- if (mbox->magic != MBOX_MAGIC)
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- return -EINVAL;
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-
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- down(&mbox->sema[chan]);
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- *data28 = MBOX_DATA28(mbox->msg[chan]);
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- mbox->msg[chan] = 0;
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-
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- return 0;
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-}
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-
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-static irqreturn_t mbox_irq_handler(int irq, void *dev_id)
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-{
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- /* wait for the mailbox FIFO to have some data in it */
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- struct vc_mailbox *mbox = (struct vc_mailbox *)dev_id;
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- int status = readl(mbox->regs + MAIL0_STA);
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- int ret = IRQ_NONE;
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-
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- while (!(status & ARM_MS_EMPTY)) {
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- uint32_t msg = readl(mbox->regs + MAIL0_RD);
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- int chan = MBOX_CHAN(msg);
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-
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- if (chan < MBOX_CHAN_COUNT) {
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- if (mbox->msg[chan]) {
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- pr_err(DRIVER_NAME
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- ": mbox chan %d overflow - drop %08x\n",
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- chan, msg);
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- } else {
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- mbox->msg[chan] = (msg | 0xf);
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- up(&mbox->sema[chan]);
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- }
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- } else {
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- pr_err(DRIVER_NAME
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- ": invalid channel selector (msg %08x)\n", msg);
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- }
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- ret = IRQ_HANDLED;
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- status = readl(mbox->regs + MAIL0_STA);
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- }
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- return ret;
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-}
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-
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-/* Mailbox Methods */
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-
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-static struct device *mbox_dev; /* we assume there's only one! */
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-
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-static int dev_mbox_write(struct device *dev, unsigned chan, uint32_t data28)
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-{
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- struct vc_mailbox *mailbox = dev_get_drvdata(dev);
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- int rc;
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-
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- device_lock(dev);
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- rc = mbox_write(mailbox, chan, data28);
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- device_unlock(dev);
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-
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- return rc;
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-}
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-
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-static int dev_mbox_read(struct device *dev, unsigned chan, uint32_t *data28)
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-{
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- struct vc_mailbox *mailbox = dev_get_drvdata(dev);
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- int rc;
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-
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- device_lock(dev);
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- rc = mbox_read(mailbox, chan, data28);
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- device_unlock(dev);
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-
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- return rc;
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-}
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extern int bcm_mailbox_write(unsigned chan, uint32_t data28)
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{
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- if (!mbox_dev)
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+ struct rpi_firmware *fw = rpi_firmware_get(NULL);
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+
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+ if (!fw)
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return -ENODEV;
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- return dev_mbox_write(mbox_dev, chan, data28);
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+ return rpi_firmware_transaction(fw, chan, data28);
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}
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EXPORT_SYMBOL_GPL(bcm_mailbox_write);
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extern int bcm_mailbox_read(unsigned chan, uint32_t *data28)
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{
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- if (!mbox_dev)
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- return -ENODEV;
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-
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- return dev_mbox_read(mbox_dev, chan, data28);
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-}
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-EXPORT_SYMBOL_GPL(bcm_mailbox_read);
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-
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-static int mbox_copy_from_user(void *dst, const void *src, int size)
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-{
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- if ((uint32_t)src < TASK_SIZE)
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- return copy_from_user(dst, src, size);
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-
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- memcpy(dst, src, size);
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+ struct rpi_firmware *fw = rpi_firmware_get(NULL);
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- return 0;
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-}
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-
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-static int mbox_copy_to_user(void *dst, const void *src, int size)
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-{
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- if ((uint32_t)dst < TASK_SIZE)
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- return copy_to_user(dst, src, size);
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+ if (!fw)
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+ return -ENODEV;
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- memcpy(dst, src, size);
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+ *data28 = rpi_firmware_transaction_received(fw);
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return 0;
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}
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+EXPORT_SYMBOL_GPL(bcm_mailbox_read);
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static DEFINE_MUTEX(mailbox_lock);
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extern int bcm_mailbox_property(void *data, int size)
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@@ -216,7 +57,7 @@ extern int bcm_mailbox_property(void *da
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GFP_KERNEL);
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if (mem_kern) {
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/* create the message */
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- mbox_copy_from_user(mem_kern, data, size);
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+ memcpy(mem_kern, data, size);
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/* send the message */
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wmb();
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@@ -226,7 +67,7 @@ extern int bcm_mailbox_property(void *da
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if (s == 0) {
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/* copy the response */
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rmb();
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- mbox_copy_to_user(data, mem_kern, size);
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+ memcpy(data, mem_kern, size);
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}
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dma_free_coherent(NULL, PAGE_ALIGN(size), mem_kern, mem_bus);
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} else {
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@@ -240,174 +81,6 @@ extern int bcm_mailbox_property(void *da
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}
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EXPORT_SYMBOL_GPL(bcm_mailbox_property);
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-/* Platform Device for Mailbox */
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-
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-/* This is called whenever a process attempts to open the device file */
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-static int device_open(struct inode *inode, struct file *file)
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-{
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- try_module_get(THIS_MODULE);
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-
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- return 0;
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-}
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-
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-static int device_release(struct inode *inode, struct file *file)
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-{
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- module_put(THIS_MODULE);
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-
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- return 0;
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-}
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-
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-/*
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- * This function is called whenever a process tries to do an ioctl on our
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- * device file. We get two extra parameters (additional to the inode and file
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- * structures, which all device functions get): the number of the ioctl called
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|
- * and the parameter given to the ioctl function.
|
|
- *
|
|
- * If the ioctl is write or read/write (meaning output is returned to the
|
|
- * calling process), the ioctl call returns the output of this function.
|
|
- *
|
|
- */
|
|
-static long device_ioctl(struct file *file, unsigned int ioctl_num,
|
|
- unsigned long ioctl_param)
|
|
-{
|
|
- unsigned size;
|
|
-
|
|
- switch (ioctl_num) {
|
|
- case IOCTL_MBOX_PROPERTY:
|
|
- /*
|
|
- * Receive a pointer to a message (in user space) and set that
|
|
- * to be the device's message. Get the parameter given to
|
|
- * ioctl by the process.
|
|
- */
|
|
- mbox_copy_from_user(&size, (void *)ioctl_param, sizeof(size));
|
|
- return bcm_mailbox_property((void *)ioctl_param, size);
|
|
- default:
|
|
- pr_err(DRIVER_NAME "unknown ioctl: %d\n", ioctl_num);
|
|
- return -EINVAL;
|
|
- }
|
|
-
|
|
- return 0;
|
|
-}
|
|
-
|
|
-/* Module Declarations */
|
|
-
|
|
-/*
|
|
- * This structure will hold the functions to be called
|
|
- * when a process does something to the device we
|
|
- * created. Since a pointer to this structure is kept in
|
|
- * the devices table, it can't be local to
|
|
- * init_module. NULL is for unimplemented functios.
|
|
- */
|
|
-const struct file_operations fops = {
|
|
- .unlocked_ioctl = device_ioctl,
|
|
- .open = device_open,
|
|
- .release = device_release, /* a.k.a. close */
|
|
-};
|
|
-
|
|
-static int bcm_vcio_probe(struct platform_device *pdev)
|
|
-{
|
|
- struct device *dev = &pdev->dev;
|
|
- struct device *vdev;
|
|
- struct vc_mailbox *mailbox;
|
|
- struct resource *res;
|
|
- int irq, ret;
|
|
-
|
|
- mailbox = devm_kzalloc(dev, sizeof(*mailbox), GFP_KERNEL);
|
|
- if (!mailbox)
|
|
- return -ENOMEM;
|
|
-
|
|
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
- mailbox->regs = devm_ioremap_resource(dev, res);
|
|
- if (IS_ERR(mailbox->regs))
|
|
- return PTR_ERR(mailbox->regs);
|
|
-
|
|
- irq = platform_get_irq(pdev, 0);
|
|
- ret = devm_request_irq(dev, irq, mbox_irq_handler,
|
|
- IRQF_IRQPOLL,
|
|
- dev_name(dev), mailbox);
|
|
- if (ret) {
|
|
- dev_err(dev, "Interrupt request failed %d\n", ret);
|
|
- return ret;
|
|
- }
|
|
-
|
|
- ret = register_chrdev(MAJOR_NUM, DEVICE_FILE_NAME, &fops);
|
|
- if (ret < 0) {
|
|
- pr_err("Character device registration failed %d\n", ret);
|
|
- return ret;
|
|
- }
|
|
-
|
|
- vcio_class = class_create(THIS_MODULE, DRIVER_NAME);
|
|
- if (IS_ERR(vcio_class)) {
|
|
- ret = PTR_ERR(vcio_class);
|
|
- pr_err("Class creation failed %d\n", ret);
|
|
- goto err_class;
|
|
- }
|
|
-
|
|
- vdev = device_create(vcio_class, NULL, MKDEV(MAJOR_NUM, 0), NULL,
|
|
- "vcio");
|
|
- if (IS_ERR(vdev)) {
|
|
- ret = PTR_ERR(vdev);
|
|
- pr_err("Device creation failed %d\n", ret);
|
|
- goto err_dev;
|
|
- }
|
|
-
|
|
- mbox_init(mailbox);
|
|
- platform_set_drvdata(pdev, mailbox);
|
|
- mbox_dev = dev;
|
|
-
|
|
- dev_info(dev, "mailbox at %p\n", mailbox->regs);
|
|
-
|
|
- return 0;
|
|
-
|
|
-err_dev:
|
|
- class_destroy(vcio_class);
|
|
-err_class:
|
|
- unregister_chrdev(MAJOR_NUM, DEVICE_FILE_NAME);
|
|
-
|
|
- return ret;
|
|
-}
|
|
-
|
|
-static int bcm_vcio_remove(struct platform_device *pdev)
|
|
-{
|
|
- mbox_dev = NULL;
|
|
- platform_set_drvdata(pdev, NULL);
|
|
- device_destroy(vcio_class, MKDEV(MAJOR_NUM, 0));
|
|
- class_destroy(vcio_class);
|
|
- unregister_chrdev(MAJOR_NUM, DEVICE_FILE_NAME);
|
|
-
|
|
- return 0;
|
|
-}
|
|
-
|
|
-static const struct of_device_id bcm_vcio_of_match_table[] = {
|
|
- { .compatible = "brcm,bcm2708-vcio", },
|
|
- {},
|
|
-};
|
|
-MODULE_DEVICE_TABLE(of, bcm_vcio_of_match_table);
|
|
-
|
|
-static struct platform_driver bcm_mbox_driver = {
|
|
- .probe = bcm_vcio_probe,
|
|
- .remove = bcm_vcio_remove,
|
|
-
|
|
- .driver = {
|
|
- .name = DRIVER_NAME,
|
|
- .owner = THIS_MODULE,
|
|
- .of_match_table = bcm_vcio_of_match_table,
|
|
- },
|
|
-};
|
|
-
|
|
-static int __init bcm_mbox_init(void)
|
|
-{
|
|
- return platform_driver_register(&bcm_mbox_driver);
|
|
-}
|
|
-
|
|
-static void __exit bcm_mbox_exit(void)
|
|
-{
|
|
- platform_driver_unregister(&bcm_mbox_driver);
|
|
-}
|
|
-
|
|
-arch_initcall(bcm_mbox_init); /* Initialize early */
|
|
-module_exit(bcm_mbox_exit);
|
|
-
|
|
MODULE_AUTHOR("Gray Girling");
|
|
MODULE_DESCRIPTION("ARM I/O to VideoCore processor");
|
|
MODULE_LICENSE("GPL");
|